Closure.



a. A. POWER.

CLOSURE.

APPLICATION FILED MAY l3, l9 6.

Patented Apr. 17;1917.

uwnvma .17. 7 0: r

ATTORNEYS JOHN A. POWER, OF HAMPTON, NEVl' JERSEY.

CLOSURE.

Specification of Letters Patent.

Patented Apr. 17, 1917.

Application filed May 13, 1916.- Serial No 97,286.

To all whom it may concern:

Be it known that I, JOHN ANTHONY POWER, a citizen of the United States, and a resident of Hampton, in the county of Hunterdon and State of New Jersey, have invented certain new and useful Improvements in Closures, of which the following is a specification.

My invention relates to means for closing openings in the sides of cylindrical or other curved vessels, as for instance in the side of a boiler, and the main object thereof is to provide means for insuring a positive seat for the nuts as well as a positive support for said seats to prevent the creeping of the closure as is common with the conventional washers interposed between said closure and nuts.

My invention is fully described in the following specification, of which the accompanying drawings form a part, in which like characters refer to like parts in each of the views, and in which Figure 1 is a fragmentary side elevation of a vessel having a curved side, an opening therethrough, and a closure for said opening constructed in accordance with my invention;

Fig. 2 ,is an enlarged view thereof in the position of one of the locking means, but' with the locking means omitted;

Fig. 3 is a section taken on the line 3-3 of Fig. 2, showing one form of my nut seating washers, and a nut seated thereon;

gig. 4 is a detached view of said washer; an

Fig. 5 is a view similar to Fig. 3 but showing-a modified form of washer.

In the drawings I have shown the shell 6 of a vessel'or container the side of which is curved and provided with an opening 7 therethrough covered by a closure plate 8 also curved to conform to the curvature of the vessel 6, and provided with slots 9 in the side edges thereof and with elongated holes 10 at the top and bottom thereof.

The shell 6 is provided with a pluralit of aced studs 11 threaded therethroug and eld by jam nuts 12 within the vessel,

one of these studs being located at each of the slots 9 and holes 10, and project outwardly of the closure 8 to present a threaded outer end for the reception of nuts 13.

Instead of permitting the nuts 13 to bear against the curved surface of the closure plate 8, or of having intervening washers of conventional form bearing against the curved surfaze of said closure I provide special washers 14 resting in recesses 15 in the closure plate 8, these recesses being either counte r-bored or being cast in the plate 8 but in either manner presenting a flat surface at the bottom thereof parallel with the face of the respective nut which bears against the washer whereby no rocking movemen; of the nut 13 is possible and the entire inr er surface of a washer is supported.

These washers may be of stepped formation as shown in Figs. 3 and 4, or they may be of conventional form as shown at 14", Fig. 5, and they may be of either angular or of circular shape in plan view.

By means of these washers a positive locking means is provided for the closure plate 8, irrespective of the curvature of said plate, when taken in conjunction with the recesses 15, ny invention consisting of the provision of a true seat for each nut 13 and of a true seat for the nut seat.

My closure is quickly and easil installed and removed, requires no specia skill nor special tools, ind is comparatively inexpens1 and desire to secure by Having fully described my invention,

2. The combination with a curved shell of terposed between each nut and said closure a vessel provided with an opening in the plate, the latter having a stepped recess side thereof, of a closure plate conforming therein to provide fiat seats for the steps 10 to the curvature of said vessel, threaded of each Washer parallel with the face of t e 5 studs held in said vessel and projected nut bearing against said washer.

through said closure plate, a nut on the outer end of each stud, and a stepped washer in- JOHN A. POWER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

